TWI507787B - Display device, joint display and backlight module - Google Patents

Description

Display device, spliced display and backlight module

The invention relates to a display device, a spliced display and a backlight module.

Currently, display devices are widely used in various consumer electronic products. Among them, the visual effect of the large screen is the mainstream pursued by the industry, and how to make the display screen of a limited size appear larger than its own size has become one of the subjects of the industry. In addition, the design of the backlight module for the above display device is also important.

In view of this, it is necessary to provide a display device with better visual effects.

It is also necessary to provide a spliced display with better visual effects.

It is also necessary to provide a backlight module that can improve the visual effect of the display device.

A display device includes a backlight module, a display panel, and an image compensating component. The display panel includes a main display area and an edge display area located outside the main display area. The main display area and the edge display area each include a plurality of pixels. The image compensating component includes a compensating portion corresponding to the edge display region, and the compensating portion is configured to expand the image displayed by the edge display region to the outer side of the edge display region away from the main display region, and the compensating portion includes the corresponding edge display region The light-input surface, the light-emitting surface, and the plurality of light-guiding paths are independent of each other and the light-guiding channel extending along the light-incident direction toward the light-emitting surface defines a plane parallel to the display panel as a first plane, and the plurality of light-guiding channels are opposite The first plane is obliquely disposed, the backlight module is configured to provide light to the display panel, and the backlight module is provided with a plurality of first light collecting units corresponding to the position of the edge display area, and defining a direction perpendicular to the first plane is In one direction, the first light collecting unit is configured to collect the light entering the first light collecting unit along the first direction toward a first collecting axis, wherein The same extending direction of the optical axis of the first set of light guide channels.

A spliced display device comprising a plurality of display devices spliced together, wherein the display device comprises a backlight module, a display panel and an image compensating component, the display panel comprising a main display area and an edge display area located outside the main display area, The main display area and the edge display area each include a plurality of pixels, and the image compensating component includes a compensation portion corresponding to the edge display area, and the compensation portion is configured to expand the image displayed by the edge display area to the remote display area An outer side of the edge display area, the compensating portion includes a light guiding surface corresponding to the edge light receiving surface, the light emitting surface, and the plurality of light guiding paths, and extending along the light entering surface in the direction of the light emitting surface, the definition is parallel to the The plane of the display panel is a first plane, and the plurality of light guiding channels are disposed obliquely with respect to the first plane. The backlight module is configured to provide light to the display panel, and the backlight module is provided with a plurality of positions corresponding to the edge display area. An optical unit that defines a direction perpendicular to the first plane as a first direction, and the first light collecting unit is configured to be along the first direction Into the first light beam toward a first set of cell collection optical axis, wherein the same optical axis extending in the first current direction of the light guide channels.

A backlight module is provided for providing a surface light source to a display panel, the backlight module includes a main light emitting area and an edge light emitting area disposed on a side of the main light emitting area, and the backlight module is provided with a plurality of positions corresponding to the edge light emitting area a first light collecting unit, wherein a plane in which the surface light source formed by the backlight module is located is a first plane, and a direction perpendicular to the first plane is defined as a first direction, and the first light collecting unit is configured to be along the first direction The light entering the first light collecting unit is collected toward a first collecting axis, wherein the first collecting axis is inclined with respect to the first plane.

Compared with the prior art, the image displayed by the edge display area can be extended to the outside of the edge display area away from the main display area, so that the edge display area can exhibit a visual effect larger than its own size, so that the entire display device and A spliced display can present a visual effect that is larger than its size. In addition, in the backlight module, since the first optical collecting axis is inclined with respect to the first plane, most of the light can be incident on the light guiding channel substantially along the extending direction of the light guiding channel, thereby improving the compensation. The light utilization rate of the part also effectively improves the display effect of the edge display area.

10, 30, 40, 50, 101‧‧‧ display devices

11, 41, 51‧‧‧ display panels

12, 102‧‧‧ image compensation components

13, 23, 43, 53‧‧‧ backlight module

110, 310‧‧‧ main display area

112, 112a, 112b, 112c‧‧‧ edge display area

114‧‧‧Non-display area

116‧‧‧ pixels

122‧‧‧Compensation Department

123‧‧‧Support

1220, 134‧‧‧ into the glossy surface

1222, 136, 336‧‧ ‧ light surface

1224‧‧‧Slanted side

1226, 4226, 5226‧‧ ‧ light guide channel

1228‧‧‧Light guide fiber

1230, 135, 1372, 235‧‧‧ bottom

1232‧‧‧ first side

1234‧‧‧ second side

130‧‧‧Main light-emitting area

131‧‧‧Edge illumination zone

132, 232, 332, 432, 532‧‧ ‧ light guide

133‧‧‧Light source

137, 437, 537‧‧‧ first light unit

P‧‧‧ first plane

D‧‧‧First direction

A1‧‧‧The first set of optical axes

1371‧‧‧ vertex

1373‧‧‧ center point

1374‧‧‧Connected

1351, 2351‧‧‧ first area

1352, 2352‧‧‧ second area

1353, 2353‧‧‧ outlets

338, 438, 538‧‧‧ second light collection unit

A2‧‧‧Second optical axis

439, 539‧‧‧ pictures

100‧‧‧Spliced display

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a display device of the present invention.

2 is a schematic plan view showing the display panel of the display device shown in FIG. 1.

3 is a schematic view showing the structure of the compensation portion and the support portion of the display device shown in FIG. 1.

4 is an assembled, isometric view of the display device of FIG. 1.

Figure 5 is an enlarged cross-sectional view taken along line IV-IV of Figure 4;

Fig. 6 is a perspective view showing the light guiding fiber of the light guiding passage shown in Fig. 5.

FIG. 7 is a schematic rear view of the backlight module shown in FIG. 1. FIG.

8 is a schematic rear view of a backlight module according to a second embodiment of the display device of the present invention.

Figure 9 is a perspective view showing a third embodiment of the display device of the present invention.

Figure 10 is a cross-sectional view of the display device of Figure 9.

Figure 11 is a perspective view showing a fourth embodiment of the display device of the present invention.

Figure 12 is a cross-sectional view showing the display device of Figure 11;

Figure 13 is a schematic view showing the reverse structure of the cymbal of the display device shown in Figure 11;

Figure 14 is a perspective view showing a fifth embodiment of the display device of the present invention.

Figure 15 is a cross-sectional view showing the display device of Figure 14.

Fig. 16 is a view showing the configuration of a light collecting unit employed in a modified embodiment of the first to fifth embodiments of the display device of the present invention.

Figure 17 is a perspective view showing the first embodiment of the spliced display of the present invention.

Please refer to FIG. 1. FIG. 1 is an exploded perspective view of a display device 10 of the present invention. The display device 10 includes a display panel 11 , an image compensating element 12 , and a backlight module 13 . The display panel 11 may be a non-self-luminous display panel such as a liquid crystal display panel or an electrowetting display panel. The image compensating element 12 is disposed above the display panel 11 . The backlight module 13 is disposed below the display panel.

The display panel 11 includes a main display area 110, an edge display area 112 located outside the main display area 110, and a non-display area 114 located outside the edge display area 112. The non-display area 114 may be a frame area of the display device 10 that does not display an image. Please refer to FIG. 2 together. FIG. 2 is a schematic plan view showing the display panel 11 of the display device 10 of FIG. The main display area 110 and the edge display area 112 each include a plurality of pixels 116, and the plurality of pixels 116 of the main display area 110 and the edge display area 112 are arranged in a matrix.

The area of the plurality of pixels 116 of the main display area 110 and the spacing between two adjacent pixels 116 are substantially identical, and the density of the pixels 116 of the main display area 110 (within a unit area) is smaller than the edge display area 112 (at The density of pixels 116 within a unit area. Specifically, the spacing between the pixels 116 of the main display area 110 may be greater than or equal to (preferably greater than) the spacing between the pixels 116 of the edge display area 112, and the area of the pixels 116 of the main display area 110 is greater than the The area of the pixels 116 of the edge display area 112. The area of the pixel 116 of the edge display area 112 is smaller than the area of the pixel 116 of the main display area 110. For example, the length of the pixel 116 of the edge display area 112 is smaller than the length of the pixel 116 of the main display area 110, or the edge is displayed. The width of the pixel 116 of the region 112 is smaller than the width of the pixel of the main display region 110. It can be understood that the width of the pixel 116 is defined as the width of the pixel in the direction X, and the length of the pixel 116 is defined as the length of the pixel 116 in the Y direction perpendicular to the direction X.

In this embodiment, the length of the pixel 116 of the edge display area 112a on the left and right sides of the main display area 110 is equal to the length of the pixel 116 of the main display area 110, but the width of the pixel 116 of the edge display area 112a of the left and right sides is wide. The width of the pixels 116 smaller than the main display area 110 is wider, and the widths of the pixels 116 of the edge display areas 112a on the left and right sides are equal.

Further, the width of the pixel 116 of the edge display area 112b of the upper and lower sides of the main display area 110 is equal to the width of the pixel 116 of the main display area 110, but the length of the pixel 116 of the edge display area 112b of the upper and lower sides is smaller than the length of the pixel 116. The pixels 116 of the main display area 110 are long, and the lengths of the pixels 116 of the upper and lower edge display areas 112b are equal.

In addition, for the pixel 116 of the edge display area 112c at the four corners of the display panel 11, the length of the pixel 116 of the edge display area 112c at the corner is smaller than the length of the pixel 116 of the main display area 110, and the corner The width of the pixel 116 at the edge display area 112c is smaller than the width of the pixel 116 of the main display area 110. Specifically, the length of the pixel 116 of the edge display area 112c at the corner may be equal to the length of the pixel of the edge display area 112a of the left and right sides, and the width of the pixel 116 of the edge display area 112c at the corner may be equal to the upper and lower sides. The width of the pixels of the edge display area 112b.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of the compensation portion 122 and the support portion 123 . The image compensating element 12 includes a compensating portion 122 and a supporting portion 123. In the present embodiment, the number of the compensation portion 122 and the support portion 123 is four, and the four compensation portions 122 and the support portion 123 are spliced together to form a hollow rectangular frame structure. The compensation unit 122 is configured to be disposed on the edge display area 112 for expanding the image displayed by the edge display area 112 to the edge display area 112 and the outer side of the edge display area 112 away from the main display area 110. . The support portion 123 is disposed on the non-display area 114 and is in contact with the compensation portion 122 to support the compensation portion 122.

4 and FIG. 5, FIG. 4 is an assembled perspective view of the display device 10 of FIG. 1, and FIG. 5 is an enlarged cross-sectional view taken along line IV-IV of FIG. Specifically, the compensation portion 122 may be an obtuse triangle, and includes a light incident surface 1220, a light exit surface 1222, and an inclined side surface 1224 connecting the light incident surface 1220 and the light exit surface 1222. The light-incident surface 1220 is disposed on the edge display area 112. The light-emitting surface 1222 intersects the light-incident surface 1220 and forms an acute angle. The inclined side surface 1224 is located on a side of the compensation portion 122 away from the main display area 110, and the The inclined side surface 1224 and the light incident surface 1220 form an obtuse angle (e.g., an obtuse angle of 135 degrees). The compensating portion 122 further includes a light guiding channel 1226 that is independent of the plurality of light guiding paths and extends in the direction of the light emitting surface 1222 along the light incident surface 1220. The projected area of the light emitting surface 1222 on the plane of the light incident surface 1220 is greater than the The area of the light incident surface 1220 is such that the light beam entering the light guiding surface 1226 from the light incident surface 1220 is expanded from the light emitting surface 1222, so that the image displayed by the edge display area 112 is enlarged and expanded. In this embodiment, the projection of the light-emitting surface 1222 on the light-incident surface 1220 covers the edge display area 112 and the non-display area 114, so that the compensation unit 122 displays the image displayed by the edge display area 112 not only in the edge display area. Above the 112, the display is also extended above the non-display area 114. In the present embodiment, the plurality of light guiding paths (ie, the extending direction of the plurality of light guiding channels 1226) are disposed substantially parallel to the inclined side surface 1224.

In this embodiment, the light guiding channel 1226 is a light guiding fiber 1228. Please refer to FIG. 6. FIG. 6 is a schematic perspective view of the light guiding fiber 1228 of the light guiding channel 1226. Each of the light guiding fibers 1228 extends from the light incident surface 1220 toward the light emitting surface 1222, and the cross-sectional area of each of the light guiding fibers 1228 remains unchanged (ie, the diameter of each light guiding fiber 1228 remains unchanged, and the upper and lower sides are consistent. ). It can be understood that, in this embodiment, the light guiding fiber 1228 mainly achieves the required degree of magnification by the inclination of the light emitting surface 1222. Specifically, the projected area of each light guiding fiber 1228 on the light emitting surface 1222 is greater than The projected area of the light guiding fiber 1228 on the light incident surface 1220 is such that the image displayed by the plurality of pixels 116 of the edge display area 112 is amplified by the corresponding light guiding fiber 1228. The plurality of light guiding channels 1226 may also be arranged by stacking a plurality of optical guiding materials such as optical fibers and light guiding sheets. In this embodiment, the optical fiber may be a plastic optical fiber, a quartz optical fiber, a glass optical fiber, or the like.

The support portion 123 has a right-angled triangular cross section, and includes a bottom surface 1230 corresponding to the non-display area 114, a first side surface 1232 perpendicular to the bottom surface 1230, and a second side surface 1234 connecting the bottom surface 1230 and the first side surface 1232. The second side surface 1234 is overlapped with the inclined side surface 1224 of the compensation portion 122. Specifically, the second side surface 1234 and the inclined side surface 1224 of the compensation portion 122 can be adhered together by a glue. The material of the support portion 123 may be a transparent material (such as glass or transparent resin) or an opaque metal or plastic material.

The backlight module 13 is configured to provide planar light to the display panel 11. Referring to FIG. 1 and FIG. 5 again, the backlight module 13 includes a main light emitting area 130 corresponding to the main display area 110 and a corresponding edge display area 112. Edge light emitting area 131. The backlight module 13 includes a light guide plate 132 and a light source 133 on a side of the light guide plate 132. The light guide plate 132 further includes a light incident surface 134 adjacent to the light source 133, a bottom surface 135 adjacent to the light incident surface 134, and a light exit surface 136 opposite to the bottom surface 135. The backlight module 13 is provided with a plurality of first light collecting units 137 corresponding to the light emitting surface 136 of the edge light emitting region 131. Defining a plane in which the surface light source formed by the backlight module 13 is located is a first plane P (where the display panel 11 is parallel to the first plane P), and defining a direction perpendicular to the first plane P as a first direction D, the first An optical unit 137 is configured to collect the light entering the first light collecting unit 137 along the first direction D toward a first collecting axis A1, wherein the first optical axis A1 and the light guiding channel 1226 are The extension direction is the same. It can be understood that the extending direction of the light guiding channel 1226 is inclined with respect to the first plane P (ie, the angle between the extending direction of the light guiding channel 1226 and the first plane P is less than 90 degrees), so the first episode The optical axis A1 is disposed obliquely with respect to the first plane P (ie, the angle between the first collecting optical axis A1 and the first plane P is less than 90 degrees).

The first light collecting unit 137 may be a pyramid structure including a vertex 1371 and a bottom surface 1372. The connecting line 1374 of the vertex 1371 to the center point 1373 of the bottom surface 1372 is inclined with respect to the first plane P, and the present embodiment In the mode, the first optical axis A1 overlaps with the line 1374 of the vertex 1371 to the center point 1373 of the bottom surface 1372.

Please refer to FIG. 7. FIG. 7 is a schematic rear view of the backlight module 13 shown in FIG. The bottom surface 135 of the light guide plate includes a first area 1351 corresponding to the main display area 110 of the display panel 11 (that is, the main light-emitting area 130 corresponding to the backlight module 13) and a corresponding edge display area 112 (that is, the corresponding backlight module 13). The second region 1352 of the edge light-emitting region 131) is further provided with a plurality of dots 1353. Preferably, a plurality of dots 1353 are formed on the bottom surface 135 by printing.

In this embodiment, the density of the dot 1353 of the first region 1351 is substantially equal to the density of the dot 1353 of the second region 1352, but the size of the dot 1353 of the first region 1351 is smaller than the size of the dot 1353 of the second region 1352. . Specifically, the ratio of the size of the mesh point 1353 of the second region 1352 (ie, the planar area) to the size of the mesh point 1353 of the first region 1351 (ie, the planar area) may range from 1.5 to 4.

Compared with the prior art, the pixel 116 of the edge display area 112 has a larger density and occupies a smaller size. However, after being compensated by the compensation unit 122 of the image compensating element 12, the image displayed by the pixel 116 of the edge display area 112 can be The outer side of the edge display area 112 is extended away from the main display area 110 so that the edge display area 112 can exhibit a visual effect larger than its own size, so that the entire display device 10 can exhibit a visual effect larger than its own size.

In addition, the compensation unit 120 can extend the image displayed by the pixels 116 of the edge display area 112 to the non-display area 114, so that the non-display area 114 can be substantially invisible when viewed in front of the display device 10, thereby being visually The borderless display effect can be achieved.

Further, in the backlight module 13, the light guide plate 132 converts the light emitted by the light source 133 into planar light and provides the light to the display panel 11. The plurality of dots 1353 of the second region 1352 are larger, and the backlight module can be used. The light intensity (i.e., brightness) of the edge light-emitting area 131 of 13 is higher than the light intensity of the main light-emitting area 130, so that the light intensity supplied to the edge display area 112 of the display panel 11 is high, so that the edge of the display panel 11 The intensity of the light emitted by the display area 112 is substantially equal to the intensity of the light emitted by the main display area 110 after being attenuated by the image compensating element 12, so that the display device 10 can obtain a better display effect. Further, the first light collecting unit 137 collects the light toward the first collecting axis A1, and the first collecting optical axis A1 and the light guiding channel 1226 extend substantially in the same direction, so that the backlight module 13 can be Most of the light is incident on the light guiding channel 1226 along the extending direction of the light guiding channel 1226, thereby improving the light utilization efficiency of the compensation portion 122 and effectively improving the display effect of the edge display region 112.

Please refer to FIG. 8. FIG. 8 is a schematic rear view of a backlight module 23 according to a second embodiment of the display device of the present invention. The display device of the second embodiment is substantially the same as the display device 10 of the first embodiment. The structure of the bottom surface 235 of the light guide plate 232 is different. Specifically, the mesh point 2353 of the first region 2351 is substantially equal to the mesh dot 2353 of the second region 2352, but the density of the mesh dots 2353 of the first region 2351 is smaller than the density of the mesh dots 2353 of the second region 2352. Specifically, the density of the dot 2353 of the second region 2352 is larger than the dot 2353 of the first region 2351, and the brightness of the edge light-emitting region 231 of the entire backlight module 23 can be effectively improved.

9 and FIG. 10, FIG. 9 is a perspective view of a third embodiment of the display device 30 of the present invention, and FIG. 10 is a schematic cross-sectional view of the display device 30 of FIG. The display device 30 of the third embodiment is substantially the same as the display device 10 of the first embodiment, and the main difference between the two is that the structure of the light guide plate 332 is different from that of the light guide plate 132 of the first embodiment. Specifically, the light guiding plate 332 is disposed on the light emitting surface 336 of the main display area 310, and the second light collecting unit 338 is configured to enter the second light collecting unit 338 along the first direction D. The light rays are collected toward a second collecting optical axis A2, wherein the direction of the second collecting optical axis A2 is the same as the first direction D.

11 and FIG. 12, FIG. 11 is a perspective view of a fourth embodiment of the display device 40 of the present invention, and FIG. 12 is a schematic cross-sectional view of the display device 40 of FIG. The display device 40 of the fourth embodiment is substantially the same as the display device 10 of the first embodiment, and the main difference between the two is that the backlight module 43 of the display device 40 of the fourth embodiment further includes a slab 439, the slab 439 It is located above the light guide plate 432 and sandwiched between the light guide plate 432 and the display panel 41. Please refer to FIG. 13 together. FIG. 13 is a schematic diagram showing the reverse structure of the slab 439 of the display device 40 of FIG. The slab 439 includes a light incident surface adjacent to the light guide plate 432, a first light collecting unit 437, and a second light collecting unit 438. The first light collecting unit 437 is disposed on the light incident surface of the corresponding edge display area 412 of the slab 439, and is configured to direct the light entering the first light collecting unit 437 in the first direction D toward the first light collecting axis A1. The collection, wherein the first collection optical axis A1 and the light guide channel 4226 extend in the same direction. The second light collecting unit 438 is configured to collect the light entering the second light collecting unit 438 along the first direction D toward a second collecting axis A2, wherein the direction of the second collecting axis A2 and the first One direction D is the same.

14 and FIG. 15, FIG. 14 is a perspective view showing a fifth embodiment of the display device 50 of the present invention, and FIG. 15 is a schematic cross-sectional view of the display device 50 shown in FIG. The display device 50 of the fifth embodiment is substantially the same as the display device 30 of the third embodiment. The main difference between the two is that the backlight module 53 of the display device 50 of the fifth embodiment further includes a slab 539, which is 539. It is located above the light guide plate 532 and sandwiched between the light guide plate 532 and the display panel 51. Specifically, the first light collecting unit 537 and the second light collecting unit 538 are disposed on the light emitting surface of the cymbal 539 away from the light guide plate 532.

The first light collecting unit 537 is configured to collect the light entering the first light collecting unit 537 in the first direction D toward the first collecting axis A1, wherein the first collecting axis A1 and the light guiding channel 5226 extend. The same direction. The second light collecting unit 538 is configured to collect the light entering the second light collecting unit 538 along the first direction D toward a second collecting axis A2, wherein the direction of the second collecting axis A2 and the first One direction D is the same. It can be understood that the first light collecting unit 537 and the second light collecting unit 538 are respectively connected to the first light collecting unit 137 and the second light collecting unit 338 of the light emitting surfaces of the light guide plates 132 and 532 of the first and third embodiments. The structure is the same, and the specific structure will not be described here.

Further, it can be understood that, in the first to fifth embodiments, the first light collecting unit 137 is a quadrangular pyramid structure (ie, a pentahedron structure including one bottom surface and four side surfaces), however, please refer to FIG. In a modified embodiment of the first to fifth embodiments, the first light collecting unit 137 may have a hexagonal pyramid structure as shown in FIG. 16 (ie, a seven-sided structure including a bottom surface and six side surfaces). The desired light collection effect can also be achieved.

Referring to FIG. 17, FIG. 17 is a schematic perspective structural view of a first embodiment of a spliced display 100 of the present invention. The spliced display 100 includes two display devices 101 arranged side by side and spliced together. The display device 101 can employ the display devices according to the first to fifth embodiments and the first to fifth embodiments.

In the spliced display 100 of the present invention, since the display device 101 has the image compensating element 102, not only the entire display device 100 can exhibit a visual effect larger than its own size, but also each frame device 101 can achieve a borderless visual effect. The splicing gap between adjacent display devices 100 is hardly visible, which effectively improves the display quality of the spliced display 100.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

no

10‧‧‧ display device

110‧‧‧Main display area

112‧‧‧Edge display area

114‧‧‧Non-display area

123‧‧‧Support

1220‧‧‧Into the glossy surface

1222‧‧‧Glossy surface

1224‧‧‧Slanted side

1226‧‧‧Light guide channel

1230, 1372‧‧‧ bottom

1232‧‧‧ first side

1234‧‧‧ second side

130‧‧‧Main light-emitting area

131‧‧‧Edge illumination zone

132‧‧‧Light guide plate

137‧‧‧First light unit

136‧‧‧Glossy

135‧‧‧ bottom

1353‧‧‧ outlets

1371‧‧‧ vertex

1373‧‧‧ center point

1374‧‧‧Connected

A1‧‧‧The first set of optical axes

Claims (31)

A display device includes a backlight module, a display panel, and an image compensating component. The display panel includes a main display area and an edge display area located outside the main display area. The main display area and the edge display area each include a plurality of pixels. The image compensating component includes a compensating portion corresponding to the edge display region, and the compensating portion is configured to expand the image displayed by the edge display region to the outer side of the edge display region away from the main display region, and the compensating portion includes the corresponding edge display region The light-incident surface, the light-emitting surface, and the plurality of light-guiding paths are independent of each other, and the light-guiding channel extending along the light-incident direction toward the light-emitting surface defines a plane parallel to the display panel as a first plane, and the plurality of light-guiding channels are opposite to the light-guide channel The first plane is obliquely disposed, the backlight module is configured to provide light to the display panel, and the backlight module is provided with a plurality of first light collecting units corresponding to the position of the edge display area, and defining a direction perpendicular to the first plane is first Direction, the first light collecting unit is configured to collect the light entering the first light collecting unit in the first direction toward a first collecting axis, wherein the A set of the same extending direction of the optical axis of the light guide channels. The display device according to claim 1, wherein the first light collecting unit is a pyramid structure, and the pyramid includes an apex and a bottom surface, and a line connecting the apex to a center point of the bottom surface is inclined with respect to the first plane. The display device of claim 2, wherein the first light collecting unit is a quadrangular pyramid or a hexagonal pyramid. The display device of claim 1, wherein the backlight module comprises a cymbal, and the first concentrating unit is disposed at a position corresponding to the edge display area of the cymbal. The display device of claim 4, wherein the cymbal includes a light incident surface adjacent to the light guide plate, and the first light concentrating unit is disposed on a light incident surface of the edge corresponding to the edge display region. The display device of claim 5, wherein the smear is further provided with a second concentrating unit corresponding to the light incident surface of the main illuminating area, the second concentrating unit is configured to be incident along the first direction The light of the second light collecting unit is collected toward a second collecting axis, wherein the direction of the second collecting axis is the same as the first direction. The display device of claim 4, wherein the cymbal includes a light-emitting surface away from the light guide plate, the first light-collecting unit is disposed on a light-emitting surface of the edge corresponding to the edge display area, and the cymbal corresponds to the main light-emitting surface a second light collecting unit is disposed on the light emitting surface of the area, and the second light collecting unit is configured to collect the light entering the second light collecting unit along the first direction toward a second collecting axis, wherein the first light collecting unit The direction of the two sets of optical axes is the same as the first direction. The display device of claim 1, wherein the backlight module comprises a light source and a light guide plate, the light guide plate comprises a light emitting surface, and the first light collecting unit is disposed on a light emitting surface of the light guide plate corresponding to the edge display area. The display device according to claim 8, wherein the light guide plate is provided with a second light collecting unit corresponding to the light emitting surface of the main display area, and the second light collecting unit is configured to inject the first direction along the first direction The light of the two light collecting units is collected toward a second collecting axis, wherein the direction of the second collecting axis is the same as the first direction. The display device of claim 8, wherein the light guide plate further includes a bottom surface opposite to the light emitting surface, the bottom surface including a first area corresponding to the main display area and a second area corresponding to the edge display area, the first The second area has multiple dots. The display device of claim 10, wherein the first area is also provided with a plurality of dots, the dot of the first region is equal in size to the dot of the second region, and the density of the dots of the first region is smaller than the first The density of the dots in the two regions. The display device of claim 10, wherein the first area is also provided with a plurality of dots, the size of the dots of the first region is smaller than the size of the dots of the second region, and the density of the dots of the first region is equal to the The density of the dots in the second region. The display device of claim 1, wherein a density of pixels of the main display area is smaller than a density of pixels of the edge display area. The display device of claim 1, wherein the display panel further comprises a non-display area located outside the edge display area, and the compensation unit extends the image displayed by the edge display area to the non-display area. The display device of claim 1, wherein the compensation portion comprises a plurality of light guiding channels for magnifying and expanding an image displayed by the plurality of pixels of the edge display region to the outside of the edge display region. The display device according to claim 15, wherein the compensation portion includes a light incident surface and a light exit surface, and the light incident surface faces the edge display region, and a projected area of the light exit surface on a plane of the light incident surface is larger than the light incident surface. The light guide channel extends from the light incident surface toward the light exit surface, and the light guide channel extends from the edge display area to the outside of the edge display area as viewed in plan. The display device of claim 16, wherein the light guiding channel is a plurality of light guiding fibers, and an area of each light guiding fiber on the light emitting surface is larger than an area of the light guiding fiber on the light incident surface, each light guiding The cross-sectional area of the fiber gradually increases in a direction from the light incident surface to the light exit surface. The display device of claim 16, wherein the light guiding channel is a plurality of light guiding fibers, and a projected area of each light guiding fiber on the light emitting surface is larger than a projected area of the light guiding fiber on the light incident surface, each The cross-sectional area of the light guiding fiber remains unchanged. A spliced display comprising a plurality of display devices spliced together, wherein the display device employs the display device of any one of claims 1 to 18. A backlight module is provided for providing a surface light source to a display panel, the backlight module includes a main light emitting area and an edge light emitting area disposed on a side of the main light emitting area, and the backlight module is provided with a plurality of positions corresponding to the edge light emitting area a first light collecting unit, wherein a plane in which the surface light source formed by the backlight module is located is a first plane, and a direction perpendicular to the first plane is defined as a first direction, and the first light collecting unit is configured to be along the first direction The light entering the first light collecting unit is collected toward a first collecting axis, wherein the first collecting axis is inclined with respect to the first plane. The backlight module of claim 20, wherein the first light collecting unit is a pyramid structure, the pyramid includes an apex and a bottom surface, and a line connecting the apex to a center point of the bottom surface is inclined with respect to the first plane. The backlight module of claim 21, wherein the first light collecting unit is a quadrangular pyramid or a hexagonal pyramid. The backlight module of claim 20, wherein the backlight module comprises a cymbal, and the first concentrating unit is disposed at a position corresponding to the edge illuminating area of the cymbal. The backlight module of claim 23, wherein the cymbal includes a light incident surface adjacent to the light guide plate, and the first light concentrating unit is disposed on a light incident surface of the ridge corresponding to the edge light emitting region. The backlight module of claim 24, wherein the second light collecting unit is disposed on the light incident surface of the main light emitting area, and the second light collecting unit is configured to shoot along the first direction The light entering the second light collecting unit is collected toward a second collecting axis, wherein the direction of the second collecting axis is the same as the first direction. The backlight module of claim 24, wherein the cymbal includes a light-emitting surface adjacent to the light-guiding plate, the first light-collecting unit is disposed on a light-emitting surface of the ridge corresponding to the edge light-emitting area, and the cymbal corresponds to the main a second light collecting unit is disposed on the light emitting surface of the light emitting area, and the second light collecting unit is configured to collect the light entering the second light collecting unit along the first direction toward a second collecting axis, wherein the light collecting unit The direction of the second set optical axis is the same as the first direction. The backlight module of claim 20, wherein the backlight module comprises a light source and a light guide plate, the light guide plate comprises a light emitting surface, and the first light collecting unit is disposed on a light emitting surface of the light guide plate corresponding to the edge light emitting area. . The backlight module of claim 27, wherein the light guide plate is provided with a second light collecting unit corresponding to the light emitting surface of the main light emitting area, and the second light collecting unit is configured to inject the light in the first direction The light of the second light collecting unit is collected toward a second collecting axis, wherein the direction of the second collecting axis is the same as the first direction. The backlight module of claim 27, wherein the light guide plate further includes a bottom surface opposite to the light emitting surface, the bottom surface including a first area corresponding to the main light emitting area and a second area corresponding to the edge light emitting area, The second area is provided with a plurality of dots. The backlight module of claim 29, wherein the first area is also provided with a plurality of dots, the dot of the first region is equal in size to the dot of the second region, and the density of the dots of the first region is smaller than the The density of the dots in the second region. The backlight module of claim 30, wherein the first area is also provided with a plurality of dots, the size of the dots of the first area is smaller than the size of the dots of the second area, and the density of the dots of the first area is equal to The density of the dots of the second region.